Medical apparatus and instruments, namely, respiratory sensor systems composed of sensors and connected electronic equipment to identify and measure types and concentrations of gases, and patient monitors for monitoring airway pressure, gas flow, gas volume, respiratory mechanics parameters, vital signs, blood pressure, heart rate, lung functions, and inhaled and exhaled gases, and parts therefor; breathing and anesthesia gas analyzers for medical diagnostics; anesthesia machines for use in patient care and parts therefor; medical ventilators and parts therefor; water traps for separating liquid and bacterial, humidity, mucus components from a gas sample withdrawn from a breathing gas of a patient before conducting the gas sample to a medical gas analyzer and parts therefor; docking interfaces incorporated into medical equipment to detect the presence and type of water traps; receptacles in the nature of basins for use with watertraps to collect water, mucus and other deposits; disposable or reusable accessories and component parts used to connect a patient to a gas analyzer to collect samples of breathing gases, namely, gas and fluid sampling lines, air filters for medical ventilators, air tubes, drainage tubes, and liquid and gas traps; bacteria filters for medical purpose; patient breathing system comprising a breathing circuit, medical tubing, gas sampling tubes, adaptors to allow gases to flow to and from airways and to preventing blockage in airways, and parts used therewith; disposable or reusable accessories for use with anesthesia machines, medical ventilators and breathing gas analyzers, namely, gas sampling lines, spirometry sensors, tubes, water traps, pulse oximetry sensors, intravenous flushing sets and anesthesia masks